On January 31, 2013, the US Patent & Trademark Office published twenty patent applications from Apple and the most intriguing of all relates to their invention concerning a new depth perception system. While Apple has worked on "presence detection systems" before relating to MacBooks and iDevices, this new system goes beyond mere detection. For instance, in one application, Apple describes the new system integrated into an iPad that would be able to project a laser based keyboard onto a table. That would definitely be considered a wow-feature that could excite consumers. Of course, that's if they actually get it to market before the competition steals their idea.